Measurement of the Semileptonic Decays B --> D tau nubar and B --> D* tau nubar

Details Measurement of the Semileptonic Decays B --> D tau nubar and B --> D* tau nubar Measurement of the Semileptonic Decays B --> D tau nubar and B --> D* tau nubar

2007-07-18

arxiv.org/abs/0707.2758v1

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 1 postscript figures, submitted to EPS 2007

Scientific paper

We present preliminary measurements of branching fractions for the semileptonic decays B --> D tau nubar and B --> D* tau nubar, which are potentially sensitive to non--Standard Model amplitudes. The data sample comprises 232x10^6 Upsilon(4S) --> BBbar decays collected with the BaBar detector at the PEP-II e+e- storage ring. We obtain B(B- --> D0 tau nubar) = (0.63 +/- 0.38 +/- 0.10 +/- 0.06)%, B(B- --> D*0 tau nubar) = (2.35 +/- 0.49 +/- 0.22 +/- 0.18)%, B(B0bar --> D+ tau nubar) = (1.03 +/- 0.35 +/- 0.14 +/- 0.10)%, and B(B0bar --> D*+ tau nubar) = (1.15 +/- 0.33 +/- 0.04 +/- 0.04)%, where the uncertainties are statistical, systematic, and normalization, respectively. By combining B- and B0bar results, we also obtain the branching fractions B(B --> D tau nubar) = (0.90 +/- 0.26 +/- 0.11 +/- 0.06)% and B(B --> D* tau nubar) = (1.81 +/- 0.33 +/- 0.11 +/- 0.06)% (quoted for the B- lifetime), with significances of 3.5 sigma and 6.2 sigma.

Affiliated with

Also associated with

No associations

Rating

Measurement of the Semileptonic Decays B --> D tau nubar and B --> D* tau nubar does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Measurement of the Semileptonic Decays B --> D tau nubar and B --> D* tau nubar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the Semileptonic Decays B --> D tau nubar and B --> D* tau nubar will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-554029